Hi - I'm quite a beginner at this and have been writing what to me is a faily complicated form - the key characteristic of the form is that the contents of subsequent drop down boxes varies depending on the user input in the previous one.

The form works fine in Firefox - but not in Internet Explorer 7 or 8 - but it did in 6. It doesn't work in Safari either.

The error code I'm getting from IE8 is:



Message: 'document.free.leveltwo.options' is null or not an object
Line: 277
Char: 1
Code: 0

Message: 'document.free.levelthree.options' is null or not an object
Line: 348
Char: 1
Code: 0

Message: 'document.free.levelfour.options' is null or not an object
Line: 388
Char: 1
Code: 0

Message: 'document.free.levelfive.options' is null or not an object
Line: 429
Char: 1
Code: 0


I think I need to define them as objects first - but I'm unclear how to do this - and have tried with out sucess.

The form is at:
http://www.mango-a-gogo.com/scot/econ/free-econ.htm

and notes on it's purpose is here (you may need this to understand what I'm trying to do)
http://www.mango-a-gogo.com/scot/econ/instructions.htm


Any advice greatly appreciated - and please explain it simply I'm quite an ignoramus at this - and am surprised I've got it to work so far!

Thanks

Scot